Blood Relation is an important topic in the Reasoning Ability section of the IDBI JAM Grade O Exam. Questions from this topic test a candidate’s ability to understand family relationships, decode information, and apply logical thinking. These questions are generally easy to moderate in difficulty and can be solved quickly with proper practice.
In this blog, we will cover the importance of blood relation questions, key concepts, types of questions asked, preparation strategy, and practice questions to help you improve your performance.
Download Blood Relation Questions for IDBI Grade O Exam 2026
In this section, we are providing Blood Relation Questions. Our experts curate these after analysing previous years’ patterns. Download Now and practice as many questions as you can.
Key Concepts to Prepare
To solve blood relation questions accurately, candidates must be familiar with the following concepts:
- Family tree representation
- Generation levels (grandparents, parents, children)
- Direct and indirect relationships
- Coding-based relations
- Symbol-based relations
Understanding these basics will help you quickly interpret the relationships described in the question.
Types of Blood Relation Questions
1. Direct Relation Questions
These are simple questions where relationships are directly stated.
Example:
Ravi is the brother of Sita, and Sita is the mother of Aman. How is Ravi related to Aman?
Answer: Uncle
2. Puzzle-Based Blood Relations
These questions involve multiple relationships and require careful analysis.
Example:
Pointing to a man, a woman says, “He is the son of my father’s only son.”
Answer: Her son
3. Coded Blood Relations
In these questions, relationships are represented using symbols or codes.
Example:
A + B means A is the father of B
A − B means A is the sister of B
Based on such symbols, relationships are decoded.
4. Family Tree Questions
Candidates are required to construct a family tree to solve the question.
This type is slightly time-consuming but highly scoring if approached correctly.
Preparation Strategy for Blood Relation
Understand Basic Relationships
Start by learning basic family terms like father, mother, uncle, aunt, cousin, etc. Clarity in these basics is essential.
Use Diagram Method
Always draw a simple family tree or diagram. This reduces confusion and improves accuracy.
Identify Keywords
Words like “only son,” “maternal,” “paternal,” and “in-law” play a crucial role. Pay close attention to these.
Practice Coded Questions
These questions can be tricky. Practice different variations to become comfortable with symbol-based relations.
Avoid Assumptions
Do not assume genders or relationships unless clearly stated in the question.
Practice Questions
Question 1
Pointing to a girl, Raj said, “She is the daughter of my mother’s only son.”
How is the girl related to Raj?
Solution:
Mother’s only son = Raj
So, the girl is Raj’s daughter
Answer: Daughter
Question 2
A is the brother of B. B is the sister of C. C is the father of D.
How is A related to D?
Solution:
A is sibling of C
C is father of D
So, A is uncle of D
Answer: Uncle
Question 3
Pointing to a man, a woman says, “He is the brother of my mother’s daughter.”
Who is the man?
Solution:
Mother’s daughter = the woman herself
Brother of the woman = her brother
Answer: Brother
Question 4
If A + B means A is the father of B,
A − B means A is the sister of B,
A × B means A is the brother of B
What is the relation of P to Q in:
P + R − Q?
Solution:
P is father of R
R is sister of Q
So, P is father of Q
Answer: Father
Question 5
Introducing a man, a woman said, “His wife is the only daughter of my father.”
How is the man related to the woman?
Solution:
Only daughter of her father = the woman herself
So, the man is her husband
Answer: Husband
Common Mistakes to Avoid
Candidates often lose marks in blood relation questions due to simple mistakes. Some common errors include:
- Not drawing a diagram
- Ignoring key relationship words
- Assuming gender incorrectly
- Rushing through questions
Avoiding these mistakes can significantly improve your accuracy.
Final Thoughts
Blood Relation is a scoring topic that requires clarity and practice rather than complex calculations. By mastering basic concepts and practicing different question types, candidates can easily attempt all questions from this topic with high accuracy.
Make it a habit to solve at least 10–15 blood relation questions daily and include them in your mock test practice. With consistent effort, you will gain confidence and speed, which are crucial for cracking the IDBI JAM Grade O Exam 2026.
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